feat: expose emulator MARCHID constant

helper_scripts/generate_EmulatorConstants.lua

@@ -15,6 +15,7 @@ end
 
 local out = io.stdout
 
+out:write('    uint64 constant CM_MARCHID = ' .. cartesi.MARCHID .. ';\n')
 out:write('    bytes32 constant UARCH_PRISTINE_STATE_HASH = 0x' .. hexstring(cartesi.UARCH_PRISTINE_STATE_HASH) .. ';\n')
 out:write('    uint64 constant UARCH_CYCLE_ADDRESS = 0x' .. hex(cartesi.machine:get_reg_address("uarch_cycle")) .. ';\n')
 out:write('    uint64 constant UARCH_CYCLE_MAX = 0x' .. hex(cartesi.UARCH_CYCLE_MAX) .. ';\n')

src/EmulatorConstants.sol

@@ -24,6 +24,7 @@ pragma solidity ^0.8.30;
 library EmulatorConstants {
     // START OF AUTO-GENERATED CODE
 
+    uint64 constant CM_MARCHID = 21;
     bytes32 constant UARCH_PRISTINE_STATE_HASH =
         0x1187b59e3fe94897c23582998adb33d3df9e8c962f6d1696dfd91adcfabb3a23;
     uint64 constant UARCH_CYCLE_ADDRESS = 0x400008;

test/EmulatorConstants.t.sol

@@ -0,0 +1,26 @@
+// Copyright Cartesi and individual authors (see AUTHORS)
+// SPDX-License-Identifier: Apache-2.0
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import {Test} from "forge-std/Test.sol";
+
+import {EmulatorConstants} from "src/EmulatorConstants.sol";
+
+pragma solidity ^0.8.30;
+
+contract EmulatorConstantsTest is Test {
+    function testCmMarchId() public pure {
+        assertEq(EmulatorConstants.CM_MARCHID, 21);
+    }
+}